Underground conduit for electric wires



W. WALTER. UNDERGROUND'GONDUIT FOR ELECTRIC WIRES.- No. 316,700. i Patented Apr. 28. 1886.

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WILLIAM WALTER, or PHILADELPHIA, PENNSYLVANIA.

UNDERGROUND CONDUIT FOR ELECTRIC WIRES.

EiPECIPICATION forming part of Letters Patent No. 316,700, dated April 28, 1885.

Application filed September 12, 1884. (No model.)

To all whom, it may concern:

Be it known that I, WILLIAM WALTER, a citizen of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented a new and useful Improvement in Underground Conduits for Elec trio W'ires, &c., which improvement is fully set forth in the following specification and accompanying drawings, in which Figure 1 represents a transverse vertical section in line m 00, Fig. 2, of an underground conduit for electric wires, &c., embodying my invention. Fig. 2 represents a longitudinal section thereof in line y Fig. 1. Fig.3 represents views of portions of the interior of the conduit. Fig. 4 represents a horizontal sec tion of a portion in line a 2, Fig. 1. Fig. 5 represents a top or plan view of the base of the conduit.

Similar letters of reference indicate corresponding parts in the several figures.

, My invention consists of an underground conduit for electric wires, steam and other pipes, thesame having novel and serviceable features, as will be hereinafter set forth.

Referring to the drawings, A represents an excavation o r trench in the ground, in which the conduit embodying my invention is laid. The frame of the conduit is formed of standards B, base-pieces (1, and arch'shaped trusses D, formed of T-iron, and located at intervals along the trench. The base-pieces are formed of T shape sockets a to receive the lower ends of the standards B, and T shape sockets a to receive the lower ends of the trusses D, it being noticed that the trusses are bolted at top to the upper ends of thestandards B, as shown more particularly in Fig. 4. I11 the webs or inner limbs, Z), of the trusses D are openings 0 for the passage of electric wires, and open ings d for gas and water pipes, 850.

F represents the gutter of the street or roadway, the same being formed hollow or tubular, of metal rested upon the top of the trusses D, and bolted to the outer webs or limbs thereof, said gutter acting as a conduit for exhaust-steam, &c., directing the latter to a sewer, drain, or other outlet. The roof of the gutter has on its under side ribs 6, of arch shape, for strengthening the same, and as the gutter is connected with the trusses it is strengthened and firmly sustained in position.

The excavation is walled back of the standards B with brick or other masonry G, and in the same is a manhole, H, which, it will be seen, is in communication with the conduit, it being noticed that said standards B are fitted against the wall G, whereby said standards and wall serve to sustain each other. Access to said man-hole is by means ofa well or pit, J, which is made in the ground in the sidewalk, the same being suitably walled and provided with a cover, J. It will be seen that when the cover is removed a person may descend into the pit, reach the man-hole, and so enter the conduit, a feature of importance for purposes of running the wires, inspection, repairs, 850., the provision of pits in the street or tearing up of the latter to reach the conduit being avoided. Back of the trusses D is an arch of brick or other masonry, as at K, thus closing the top of the conduit, said arch resting on the trusses, and thus a secure and reliable covering of the conduit is provided.

In lieu of masonry K, I may employ a sheathing of suitable metal, as shown at K in the right-hand side of'Fig. 3, producing similar results.

In order to provide additional support for the masonry or sheathing K, I provide additional trusses D, which are employed at intervals between the trusses D, it being seen that the bottom of the trusses D D and the sheathing or masonry K, as well as the standards B, are fitted to and supported upon the bases 0. Supported on the floor of the conduit or plates thereon are brackets or stands L, which are adapted to sustain steam or other heating pipes, as shown; or, if desired, wires, cables, steam and water pipes, &c. The number of manholes H depends on the length of the conduit and requirements of the same.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

' 1. An underground conduit having a metallic frame formed of standards and trusses, the latter rising from a base and joining the top of the standards, substantially as and for the purpose set forth.

2. An underground conduit having a metallic frame formed of standards, trusses, ,and.

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a base, said trusses rising from the base and joining the tops of the standards, the trusses and standards being connected with the base and supported thereon, substantially as and for the purpose set forth.

3. An underground conduit having a frame formed of standards and trusses of T-iron, and a base on which said standards and trusses are supported, substantially as and for the purpose set forth.

4. Anundergroundconduitbelowthestreetpavement, in combination with a pit, J, below the sidewalk, the wall G of said pit being between the conduit and pit, and provided with a man-hole, and having the side standards of the conduit-frame fitted against said wall, substantially as and for the purpose set forth. I

5.- A frame for an underground conduit, having trusses of T-iron the web's whereof are perforated, substantially as and for the purpose set forth.

6. Thestandards B, having the trusses D,

9. An underground conduit formed of the base 0, standards B, trusses D, masonry G, having man-hole therein, in combination with the pit J, substantial'lyas and for the set forth. Q

WILLIAM WALTER.

Watts-see. g V v 7 JOHN A. WIEDERsHEIM, A. P. GRANT.

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